[Bug target/55774] New: AVX integer store segfault

[gcc-bugzi...@ben-strasser.net]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55774



             Bug #: 55774

           Summary: AVX integer store segfault

    Classification: Unclassified

           Product: gcc

           Version: unknown

            Status: UNCONFIRMED

          Severity: major

          Priority: P3

         Component: target

        AssignedTo: unassig...@gcc.gnu.org

        ReportedBy: gcc-bugzi...@ben-strasser.net





The following code segfaults



#include <immintrin.h>



int main(){

    unsigned a[8] = {0x22222222u, 0xAAAAAAAAu, 0x11111111u, 0x33333333u,

0xDEADBEAFu, 0xFAAAAAAAu, 0xDEADBEAFu, 0xFAAAAAAAu};

    unsigned b[8];



    __m256i x = _mm256_load_si256((__m256i*)a);

    _mm256_store_si256((__m256i*)b, x);

}



when compiled with 



g++ -mavx mini.cpp -o mini && ./mini



The output of g++ -S is



    .file    "mini.cpp"

    .text

    .globl    main

    .type    main, @function

main:

.LFB707:

    .cfi_startproc

    pushq    %rbp

    .cfi_def_cfa_offset 16

    .cfi_offset 6, -16

    movq    %rsp, %rbp

    .cfi_def_cfa_register 6

    andq    $-32, %rsp

    subq    $40, %rsp

    movl    $572662306, -40(%rsp)

    movl    $-1431655766, -36(%rsp)

    movl    $286331153, -32(%rsp)

    movl    $858993459, -28(%rsp)

    movl    $-559038801, -24(%rsp)

    movl    $-89478486, -20(%rsp)

    movl    $-559038801, -16(%rsp)

    movl    $-89478486, -12(%rsp)

    leaq    -40(%rsp), %rax

    movq    %rax, 24(%rsp)

    movq    24(%rsp), %rax

    vmovdqa    (%rax), %ymm0

    vmovdqa    %ymm0, -120(%rsp)

    leaq    -8(%rsp), %rax

    movq    %rax, 32(%rsp)

    vmovdqa    -120(%rsp), %ymm0

    vmovdqa    %ymm0, -88(%rsp)

    movq    32(%rsp), %rax

    vmovdqa    -88(%rsp), %ymm0

    vmovdqa    %ymm0, (%rax)

    movl    $0, %eax

    leave

    .cfi_def_cfa 7, 8

    ret

    .cfi_endproc

.LFE707:

    .size    main, .-main

    .ident    "GCC: (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3"

    .section    .note.GNU-stack,"",@progbits









My GCC version is: g++ (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3